`7.` We have drawn the picture for four hours.

`->` S + started + V-ing + time + ago

`=` S + have/has + P2 + for + time

`8.`

`-` We haven't gone to the cinema for two months.

`-` The last time we went to the cinema was two months ago.

`-` It's two months since we last went to the cinema.

`->` S + last + Ved/V2 + time + ago

`=` S + have/has not + P2 + for + time

`=` The last time + S + Ved/V2 + was + time + ago

`=` It's + time + since + S + last + Ved/V2

`9.` This is the most interesting film I have ever seen.

`->` S + have/has + never + P2 + such + a/an + adj + Noun

`=` This is + so sánh nhất + Noun + S + have/has + ever + P2

`7` We have drawn the picture for four hours .

`-` S + have/has + V3/V_ed + O + time : Ai đó đã làm gì được bao lâu rồi ...

`8` 

`@` It was two months since we last went to the cinema .

`@` We haven't went to the cinema for two months .

`@` The last time we went to the cinema was two months ago .

`9` I haven't seen a more interesting film than this before .

`<=>` It + be + time + since + S + last + V(quá khứ) + O : Đã là bao lâu kể từ khi ai đó lần cuối làm gì ...

`<=>` S + have/has + not + V3/V_ed + O + time : Ai đó đã không làm gì trong bao lâu ...

`<=>` The last time + S + V(quá khứ) + O + was + time : Lần cuối ai đó làm gì là khi nào ...

`<=>` S + last + V(quá khứ) + O + time : Ai đó lần cuối làm gì khi nào ...

`-` S + have/has + V3/V_ed + (a/an) + so sánh hơn + than + N + before : Ai đó chưa bao giờ làm gì như thế nào trước đây .